Introduction to the air-raid shelter: After the "128" Songhu War broke out in 1932, Japanese military planes often raided Nanjing, so the Nationalist Government added this air-raid shelter when building the government office building. The building has two floors, made of steel frames. Made of cement, the upper floor is several meters thick and can withstand heavy bombings. The interior water, electricity and ventilation facilities are all available, and it is only tens of meters away from the office building, making evacuation extremely convenient.